5.7.6 st peters interchange portal · pdf file7.06.2015 · 5.7.6 st peters...

New M5 WestConnex Urban Design Urban Design96

5.7.6 St Peters Interchange Portal

Design intentAt St Peters interchange the design approach to the tunnel portals differs from that adopted for the western portals at Kingsgrove. An entirely different set of circumstances occurs at the interchange. Here,aformerlandfillwouldbetransformed into a vibrant new interchange parkland,significantlyincreasingvegetationcoverage with new passive recreation areas for the local community. The new infrastructure elements within the interchange need to ‘sit within’ and be integrated with the parklands as opposed to being imposed upon them.

The design provides a simple and elegant solutionthatunifiesarangeofgeologicalissues by wrapping the portal and approaches in a giant ‘sculptural veil’ form. The veil provides a light and lyrical element that would read as a sculpture within the overall interchange parkland. This approach could be adopted for the future M4-M5 Link portals adjacent to Campbell Street.

Materials, colours and finishesThe ‘sculptural veil’ is a series of coloured rectangular aluminium sections laid in a curvilinear series at varying angles to establish a seemingly continuous, but transparent, sinuous form. It presents a unique and memorable experience for drivers entering and exiting the tunnel and also for the local community and park users who would be able to view the portals from various elevated viewpoints.

The veil would also include LED feature lighting using a programmable system to provide a range of lighting effects adding to the night-time experience. Variable message signs (VMS), lane signals and the like would be integrated in the design with service and maintenance access via a gantry behind the veil. Above the portal would be a series of retaining walls and terraces to support the installation of new soilprofilesintheorderofonemetredeep,capable of supporting new parkland vegetation. The following pages provide preliminary plans, perspectives and sections of the portal. These would be further developed during detailed design.


VOLUME 2 (p) ST PETERS INTERCHANGE

Response to Tender • DESIGN AND CONSTRUCTION OF NEW M5 MAIN WORKS • Contract No. 14.7205.1875

ARTISTS IMPRESSION - ST PETERS TUNNEL PORTAL

ARTISTS IMPRESSION - ST PETERS TUNNEL PORTAL

Figure 69 Artist’s impression - St Peters Tunnel Portal

New M5 WestConnex Urban Design Urban Design98 38WESTCONNEX | NEW M5 MAIN WORKS

URBAN AND LANDSCAPE DESIGN


01 - ST PETERS EASTERN PORTAL - CONCEPT PLAN 1:250 @ A3Figure 70 St Peters eastern portal plan


39 Response to Tender • DESIGN AND CONSTRUCTION OF NEW M5 MAIN WORKS • Contract No. 14.7205.1875


MEDIANMEDIAN

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SCREEN PANELS FIXED TO PORTAL STRUCTURE APPROX. 30 PANELS

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14 SCREEN PLANTING

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16 OVERHEIGHT PROTECTION BARRIER

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This Drawing may have been prepared using colour and may be incomplete if copied

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INFORMATION SHOWN ON THIS DRAWING IS PRELIMINARY ONLYAND SUBJECT TO ADJUSTMENT DURING DETAILED DESIGN STAGE.

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SPI EASTERN PORTALURBAN AND LANDSCAPE DESIGN

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02 - ST PETERS EASTERN PORTAL - ELEVATION 1:250 @ A3

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CONCEPT DESIGN

Figure 71 Indicative St Peters Eastern Portal elevation

New M5 WestConnex Urban Design Urban Design100 40WESTCONNEX | NEW M5 MAIN WORKS



G.L 0.00

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SECTION ELEVATION - EASTERN PORTAL FEATURE SCREEN1:250

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SECTION ELEVATION - EASTERN PORTAL FEATURE SCREEN1:250

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03 - ST PETERS EASTERN PORTAL - SECTION ELEVATION 1:250 @ A3

Figure 72 Indicative St Peters Eastern Portal elevation


5.7.7 BridgesThe interchange includes a total of six road bridges and these would form a notable feature within the interchange landscape. Attention has been paid to the design detailing of these road bridges to ensure an elegant and minimalist form. Within the interchange itself the bridges would be stacked, providing connectivity between the St Peters portal, future M4-M5 Link portal, future Sydney Gateway, the New M5 ramps to Euston and Campbell Roads and Gardeners Road. To accommodate these connections the bridges would be layered in 4 levels. With mass planting in the interchange the scale of the road bridges would be tempered.

Design intentThe design approach to bridges in the interchange must carefully consider their forms,spans,profile,finishesandpierrhythm in conjunction with well-coordinated detailing. The architectural treatment of the bridges is considered paramount with clean lines and incorporating piers and abutments sympathetic to the structural form.

The bridges would have architecturally profileddecksoffitsandbarrieredgestoensureanelegantfinishbefittingthecriticalimportance of the iconic interchange. Feature lighting would also be included to highlight key elements of the structures.

Within the interchange there are a number of feature bridges that would provide new connections:

1. Campbell Road bridge over Alexandra Canal

A dedicated road bridge would be constructed, continuing the alignment of Campbell Road east over the Alexandra Canal connecting to Bourke Road (the Campbell Road bridge). The bridge would span the entire canal and allow for two eastboundandtwowestboundtrafficlanes. In addition a shared cycle and pedestrian path would be included on the northern side of the bridge and a footpath on the southern side.

The Alexandra Canal is a state heritage listed item owing to its rarity as one of only twoartificialcanalsconstructedinNSW.The design of the bridge respects the value of the canal by ensuring a clear span over the waterway.

The clear span is designed to avoid disturbing the highly contaminated Alexandra Canal bed sediments. The bridge superstructure span is made up of six steel trough girders with a cast in-situ concrete deck. The continuous spans are designed to reduce the depth of the superstructure to minimise embankment height.

Figure 73 Artist impression of Campbell Road bridge

39WESTCONNEX | NEW M5 MAIN WORKS


VOLUME 2 (p) APPENDIX A

ALEXANDRA CANAL

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01 CAMPBELL ROAD BRIDGE OVER ALEXANDRA CANAL - PLAN1:500

02 CAMPBELL ROAD BRIDGE OVER ALEXANDRA CANAL - ELEVATION1:500

03 CAMPBELL ROAD BRIDGE OVER ALEXANDRA CANAL - SECTION1:200

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BRIDGES - CAMPBELL STREET BRIDGE OVER ALEXANDRA CANAL 1:200 / 1:500 @ A3

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01 CAMPBELL ROAD BRIDGE OVER ALEXANDRA CANAL - PLAN1:500

02 CAMPBELL ROAD BRIDGE OVER ALEXANDRA CANAL - ELEVATION1:500

03 CAMPBELL ROAD BRIDGE OVER ALEXANDRA CANAL - SECTION1:200

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Figure 74 Indicative plan Campbell Road bridge over Alexandra Canal


2. Gardeners Road Bridge over Alexandra Canal

The Gardeners Road bridge would provide an easterly connection for vehicles travelling north on the New M5. Gardeners Road bridge would provide the main eastbound route from the interchange.

The design of Gardeners Road bridge would feature a clear span over water and would be similar in overall appearance to the Campbell Road bridge. It would have a similar pier shape, span, barrier/edge details and abutments so that the two bridges read as a suite.

95 Response to Tender • DESIGN AND CONSTRUCTION OF NEW M5 MAIN WORKS • Contract No. 14.7205.1875


BRIDGES - GARDENERS ROAD BRIDGE OVER ALEXANDRA CANAL 1:1000 @ A3

Figure 75 Indicative Gardeners Road bridge over Alexandra Canal

5.7.6 st peters interchange portal · pdf file7.06.2015 · 5.7.6 st peters...

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